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Search Again :: Adv Search 254 results in 0.000s
<123456789>
  • VERY loud beeper!!I recently replaced a dead beeper with another from an old set of headphones, only this is MUCH louder! Is there a way of bringing the volume down a …

    ... issue 3 board use a ZTX 450 connected to the 5V ...
    Pierre Pierre June 2014 Hardware
  • Popular Computing WeeklyHope someone can help me, I've been typing in a whole heap of early Type-ins for the Amstrad CPC 464 and have typed in a program, though it's not wor…

    ... THEN h=h-10
    510 IF h4095 THEN h=0 ...
    CP/M User CP/M User June 2014 Chit chat
  • Popular Computing WeeklyHope someone can help me, I've been typing in a whole heap of early Type-ins for the Amstrad CPC 464 and have typed in a program, though it's not wor…

    ... THEN h=h-10
    510 IF h4095 THEN h=0 ...
    rich_chandler rich_chandler June 2014 Chit chat
  • Popular Computing WeeklyHope someone can help me, I've been typing in a whole heap of early Type-ins for the Amstrad CPC 464 and have typed in a program, though it's not wor…

    ... THEN h=h-10
    510 IF h4095 THEN h=0 ...
    CP/M User CP/M User June 2014 Chit chat
  • Drawing a dotted line...Hi Folks, I cannot be the first person to want this (?) so here goes! Does anyone have a MC routine that does the same as the BASIC DRAW command bu…

    ... REM DRAW_LINE in BASIC
    510 LET px=PEEK 23677: LET ...
    Battle Bunny Battle Bunny July 2014 Sinclair Basic
  • Drawing a dotted line...Hi Folks, I cannot be the first person to want this (?) so here goes! Does anyone have a MC routine that does the same as the BASIC DRAW command bu…

    ... REM DRAW_LINE in BASIC
    510 LET px=PEEK 23677: LET ...
    Paddy Coleman Paddy Coleman July 2014 Sinclair Basic
  • ZX Spectrum 48K Issue 3, loss of -5V rail.Hi all, I've googled this problem and poured over the electrical diagrams for the circuitry concerning the power supplies and I believe I know what …

    ... ?

    I have a ZTX 213 replacement and a 204 ...
    Renegade Renegade August 2014 Hardware
  • Spectrum Issue 2 - TR6 ReplacementI've just got my hands on an Issue 2 ZX Spectrum, that needed some repairs. The picture quality after doing a composite modification was pretty shodd…

    ... transistor is different to the ZTX series.

    [I][B ...
    1024MAK 1024MAK August 2014 Hardware
  • Spectrum 48k ProblemsHi all Got my 48k today but it's playing up abit... First time i turn it on it was like this: [IMG]http://s26.postimg.org/hlg9d3f3d/IMG_20140830_…

    ... 's not working, test the ZTX 450 and the two diodes ...
    DEATH DEATH September 2014 Hardware
  • Spectrum 48k ProblemsHi all Got my 48k today but it's playing up abit... First time i turn it on it was like this: [IMG]http://s26.postimg.org/hlg9d3f3d/IMG_20140830_…

    ... 's not working, test the ZTX 450 and the two diodes ... key. :confused:

    is ZTX 450 located in TR4?
    dreamscape dreamscape September 2014 Hardware
  • Spectrum 48k ProblemsHi all Got my 48k today but it's playing up abit... First time i turn it on it was like this: [IMG]http://s26.postimg.org/hlg9d3f3d/IMG_20140830_…

    There's only one ZTX 450 - it can be replaced ... with a ZTX 650 if you can't ...
    DEATH DEATH September 2014 Hardware
  • Spectrum 48k ProblemsHi all Got my 48k today but it's playing up abit... First time i turn it on it was like this: [IMG]http://s26.postimg.org/hlg9d3f3d/IMG_20140830_…

    Issue two - no ZTX 450 in the output audio - so, test:

    D9, 10 and 13 as well as the caps and resistors mentioned earlier (R36, R37, C32 and C35)
    DEATH DEATH September 2014 Hardware
  • Spectrum 48k ProblemsHi all Got my 48k today but it's playing up abit... First time i turn it on it was like this: [IMG]http://s26.postimg.org/hlg9d3f3d/IMG_20140830_…

    ... />
    [QUOTE]Issue two - no ZTX 450 in the output audio ...
    dreamscape dreamscape September 2014 Hardware
  • 48k - Why Won't it Buzzzz?Hi WOS ;) I bought a load of Spectrum games off eBay and thrown in for good measure was a 48k 1984 Issue 6a circuit board that I was told was for sp…

    ... the broken coil. Use a ZTX 650/1/2 for tr4 ... a PNP device, such as ZTX 750 - you don't need ...
    DEATH DEATH September 2014 Hardware
  • Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…

    ... around (they were the original ZTX 313 by the looks of ...
    Wiggs Wiggs September 2014 Hardware
  • Post Composite mod video not bright enough - FIXHiall, I have a few Spectrums and decided to modify them all with the composite video mod, i.e. redirect the feed to the modulator direct to the out…

    ... video. Change it for a ZTX 313 or similar and watch ...
    Spirantho Spirantho September 2014 Hardware
  • Post Composite mod video not bright enough - FIXHiall, I have a few Spectrums and decided to modify them all with the composite video mod, i.e. redirect the feed to the modulator direct to the out…

    ... video. Change it for a ZTX 313 or similar and watch ...
    IanJ IanJ September 2014 Hardware
  • Issue 4S differencesI decided to buy an Issue 4S PCB after reading much about them on here. It was originally in a plus case which didn't come in the sale. I've been run…

    ... part of the world whereas ZTX transistors are British.

    Renegade Renegade September 2014 Hardware
  • Post Composite mod video not bright enough - FIXHiall, I have a few Spectrums and decided to modify them all with the composite video mod, i.e. redirect the feed to the modulator direct to the out…

    ... video. Change it for a ZTX 313 or similar and watch ...
    Renegade Renegade September 2014 Hardware
  • Dodgey R62 / D16 on Issue 2?Hello all, I am still beavering away trying to work out why my Issue 2 fails and after a much closer visual inspection I noticed what looks like som…

    ... , TR6, TR8, TR9
    ZTX 653 = TR4
    ZTX 753 = TR5, TR7
    Korinel Korinel October 2014 Hardware
  • Dodgey R62 / D16 on Issue 2?Hello all, I am still beavering away trying to work out why my Issue 2 fails and after a much closer visual inspection I noticed what looks like som…

    Nooooo, TR7 - ZTX 450

    This ... version.

    The ZTX 450 is a lower power ... version (pretty much) of the ZTX 650 - it has a ... be replaced with a ZTX 650/1/2/3< ... be replaced with a ZTX 750/1/2/3 ... of them.

    ZTX 653 will replace a '650 ...
    DEATH DEATH October 2014 Hardware
  • Dodgey R62 / D16 on Issue 2?Hello all, I am still beavering away trying to work out why my Issue 2 fails and after a much closer visual inspection I noticed what looks like som…

    ... and switched the TR7 to ZTX 450!


    So ... , TR8, TR9
    ZTX 653 = TR4, TR7
    ZTX 753 = TR5
    Korinel Korinel October 2014 Hardware
  • Dodgey R62 / D16 on Issue 2?Hello all, I am still beavering away trying to work out why my Issue 2 fails and after a much closer visual inspection I noticed what looks like som…

    ... aware (especially when replacing a ZTX with a BC549) of the ...
    1024MAK 1024MAK October 2014 Hardware
  • Dodgey R62 / D16 on Issue 2?Hello all, I am still beavering away trying to work out why my Issue 2 fails and after a much closer visual inspection I noticed what looks like som…

    ... aware (especially when replacing a ZTX with a BC549) of the ...
    Korinel Korinel October 2014 Hardware
  • Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …

    ... /> If I use a ZTX 651 and ZTX 750 will they be ...
    rune rune November 2014 Hardware
  • Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …

    ... of the E-Line transistors (ZTX range) but I'm not ... alternate pads for either a ZTX 650 or the TIPP thingy ... 's what you do..... The ZTX (TR4) transistor fits into the ... pin-out config as the ZTX range (E-Line). If ... you fit a ZTX 750 here, then it just ...
    DEATH DEATH November 2014 Hardware
  • Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …

    ... post.

    Yes the ZTX 751 is a higher V ... spec ZTX 750 and is perfectly suitable ...
    DEATH DEATH November 2014 Hardware
  • Fast Condition TestingHello my friends, I have been writing some input and string handling routines in BASIC lately - yeah I could write them super fast in C/ASM via z88d…

    Hi Folks,

    On a similar vein I wrote the following general purpose input routine a couple of years back:

    [CODE]100 REM ----------------------
    110 REM XINPUT DEMO
    120 REM \* 2011 PeaSea Software
    130 REM 3.1 18- ...
    Paddy Coleman Paddy Coleman November 2014 Sinclair Basic
  • Ebay +3 MadnessJust out of idle curiosity, why on earth would people be bidding ?185 with 2 days still to go on this seemingly run of the mill +3? [URL="http://www…

    ... ) that was bid up to ?510 by a couple of zero ...
    balford balford January 2015 Hardware
  • Ebay +3 MadnessJust out of idle curiosity, why on earth would people be bidding ?185 with 2 days still to go on this seemingly run of the mill +3? [URL="http://www…

    ... ) that was bid up to ?510 by a couple of zero ...
    chinnyhill10 chinnyhill10 January 2015 Hardware
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